Thermostat, coolant - 352045979000 MAGNETI MARELLI

Thermostat is a device for maintaining a static (constant) temperature, as its name implies. There are thermostats of different designs in many devices and mechanisms, from water heaters to refrigerators. There is also a thermostat in a car's internal combustion engine (liquid-cooled, of course). In a car, the thermostat regulates the temperature of the coolant (antifreeze): it accelerates the warm-up of a cold engine and provides heat removal from the hot one. Therefore, the engine works more efficiently and more comfortably for the driver, especially in winter - without a thermostat, the stove would usually blew cold air.

1. 5 (E34)
2. 5 Saloon (E34)
3. 5 Touring (E34)
4. 5 (E39)
5. 5 Saloon (E39)
6. Z8 Roadster (E52)
7. 6 (E63)
8. 6 Convertible (E64)
9. 5 Touring (E61)
10. 3 Coupe (E92)
11. 3 (E90)
12. 3 Saloon (E90)
13. 3 Convertible (E93)
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The principle of the thermostat work

The classic MAGNETI MARELLI brand Thermostat, coolant is a movable valve that moves due to a change in the external environment - heating or cooling of antifreeze. The thermostat is made of a thermoelement filled with a substance resembling wax in structure - ceresin, with the addition of copper powder, graphite or aluminum for better thermal conductivity. At a certain temperature of the antifreeze, ceresin expands, opening the thermostat valve. When the motor cools down, ceresin contracts and the thermostat closes again.